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A084199 Smallest prime q<prime(n) such that q+1 divides prime(n)+1, a(n)=1 if no such q exists. 0
1, 1, 2, 3, 2, 1, 2, 3, 2, 2, 3, 1, 2, 3, 2, 2, 2, 1, 3, 2, 1, 3, 2, 2, 13, 2, 3, 2, 1, 2, 3, 2, 2, 3, 2, 3, 1, 3, 2, 2, 2, 13, 2, 1, 2, 3, 3, 3, 2, 1, 2, 2, 1, 2, 2, 2, 2, 3, 1, 2, 3, 2, 3, 2, 1, 2, 3, 1, 2, 13, 2, 2, 3, 1, 3, 2, 2, 1, 2, 1, 2, 1, 2, 13, 3, 2, 2, 1, 2, 3, 2, 2, 3, 2, 3, 2, 2, 2, 3, 1, 3, 2, 2 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

COMMENTS

a(n)=1 iff A084196(n)=0;

conjecture: A008578 = range of values > 1.

LINKS

Table of n, a(n) for n=1..103.

CROSSREFS

Sequence in context: A170823 A068073 A032452 * A277745 A030314 A269624

Adjacent sequences:  A084196 A084197 A084198 * A084200 A084201 A084202

KEYWORD

nonn

AUTHOR

Reinhard Zumkeller, May 18 2003

STATUS

approved

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Last modified December 5 19:19 EST 2016. Contains 278770 sequences.